Paper and board — Determination of water vapour transmission rate of sheet materials — Dynamic sweep and static gas methods
|Publication Date:||1 March 2021|
|ICS Code (Paper and board):||85.060|
This document describes general test methods for determining the water vapour transmission rate of sheet materials by means of a dynamic gas method or a static gas method. Depending on the method and specific apparatus employed, materials up to 38 mm thick and with water vapour transmission rates in the range from 0,05 g/(m2·d) to 65 g/(m2·d) can be tested. The basis of the function of the instrumental techniques is briefly described. Advice on calibration is given in Annex B.